Car-door lock



Jan. L6, w23. 11,442,553

F. L FISHER. CAR DOOR LocK, FILED MAY B, 1922.

2 SHEETS-SHE-ET I M0/fau 2 SHEETS-SHEET 2 F. L. FISHER. CAR DooR LocK. FILED MAY 8, 1922,

im 16, w23.

Fatented dan. l5, i923.

FRANK L. FISHER, 0F IvTILWAUKEE, VJISGONSIN.

GAR-DOOR LOCK,

Application inea May s, 1922. serial No. 559,272.

' ing device.

ils is well known, burglary of freight cars occurs most commonly Vwhen the 'cars are made up in trains and either at rest in the i'reight yard, or while in mot-ion onthe roadway. The reason for this is that the cars,

whend'sconnected from each other, arev usually attended by l1-eight handlers in the regular employ or' the company, so that burglary or theft is not likely to occur at this time.

llhe invention comprises a car door having a series of recesses therein, a spring urged locking bolt, manually operable cani means for retracting a lockng bolt, and means operating wl =n the coupling knuckle in coupling position to prevent operation olf the-manually o'oerable camming means. lfvheu the toupli` knuckle is in uncoupled position, the manually operable means may be actuated to retract the locking bolt.

The object o'l the invention is the provision 'it devices operative. to prevent a door from being unlocked while one car is coupled to another, yet manipulable in a convenient manner when `the car is uncoupled to unlock a door. The manually operable means is conveniently disposed with respect the door, so that the door may be pushed to a proper closed position and the resilient ineens for urging the locking plunger permitted to operate. By having the locking plunger manually controllable and by the provision ot resilient means for urging the plunger into locking position, such t deinaging'the door as would arise .in the operation of directly actuable looking1 ineens operable by the coupling knuckle, is eliiui L l't the plunger were driven outwardly positively, it might contact. with the door and not be received in a recess. ln this case iilamage would result.

lllith the above and other objects in view, which will appear as the description proceeds7 my invention resides in the novel construct-ion, combination and arrangement oi' parts, substantfally as hereinafter described and more particularly delined by the appended claims, it being understood that such changes in the precise embodiment. olf the herein disclosed invention may bel made as come within the scope of the claims.

In the accompanying drzuvings, l have illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode l have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a cross section through a car showing an embodiment of the invention in plan, the coupling` head being shown partly in section. The view is taken substantially on the line 1 1 of Figure 3.

Figure 2 is a cross section taken on the line 2 2 of Figure 3.

Figure 3 is a sectional view showing the knuckle coupling in unlocked position.

Figure 4L is a cross section on the line i-.t of Figure 1, bringing out the character olE the locking bolt.

rl`he door is slida-ble along car side 11 and is provided with a series of recesses 12. To the inner tace of side 11 chambered support 13 is secured. The housing and side 11 have openings Ythrough which locking plunger lll is movable. The inner ond ot the plunger moves in an opening in wall 15. The plunger is urged outwardly by means o't a helical spring 1G contacting with a collar 1T carried by the plunger.

ln Figure 1 the door 10 is shown in closed position. The door may be slid to this position, riding along the bevelled end ot the plunger 141-, which inclined to permit movement of the door in one direction, but to prevent. reverse movement. rlhe locking plunger has an opening 18 therein. Bracket bearings 19 and 2O rotatably support a shaft 21 along the inner side of the car. Rigid with the sha'tt is a cani 22 adapted. when plunger lei is in locking position, to project into the lower part ot opening 1.8. Che shaft 21 is rotatable by a bell cra .k 23 having a handle thereon, the handle jn'ojecting` through an opening in the rar floor.

The movement of the handle 2l in a counter clockwise direction, looking at Figure 2. causes cam 22 to move upwardly in openng 18, retracting locking plunger 1l. lVhen the hand is removed from handle 2l. spring' 16 urges plunger 1% outwardly, cam 22 being pushed downwardly `by the plunger in its movement. Thus conveniently manipulable means are provided for unlocking the door, the means being adapted on the removal of the hand of the operator to permity locking plunger 14 to return to normal lockino' position.

lell crank 23 carries at one end flanges 26 adapted to receive therebetween an end of lever 27 pivotally mounted'at 2S to wall 29. The end of the lever carries a shoe 30 over lyingan end of an upwardly extending arm 31 of the lever 32, pivotally mounted on rod 33 to coupling head 34 which carries coupling knuckle 35, having a tail 36 adapted to overly in locking position the contiguous end of lever 32. vFigure 1 shows the relationship of parts when the knuckle 35'is in coupling position. Lever 32 isthen substantially immovable and shoe 30 on lever 27 is prevented from moving downwardly. It is, therefore, impossible to move handle 24 in a counter` clockwise direction hence cam 22 cannot be moved upwardly in opening 18. It will be apparent, therefore, that when the car is coupled to another car, the locking plunger 14 cannot be moved to unlocking position.

When, however, coupling knuckle 35 is in uncoupled position, as shown in Figure 3, tail 36 does not prevent the upward movement of the adjacent end of lever'32 so that arm 31 may move downwardly, as, also, may shoe 30. The handle 24 may then be moved in a counter-clockwise direction, looking at Figure 2, and cam 22 may thus be moved upwardly in opening 18, retracting locking bolt 14. It is thus apparent that when the car is uncoupled, the position of knuckle 35 permits the manual operation ot handle 24 and the unlocking of the door 10. The door 10 may be slid to a desired position and handle 24 may be released by the operation and plunger 14 may be permitted to engage in a recess 12. The convenient manual manipulation oi handle 24 thus permits the ready centering o' the end of locking plunger 14 in a recess 12. Thus the locking of the door is not attendantwith any danger of daniage,such as would occur if a direct and positive locking means were provided actuable on the coupling of the car to drive a locking plunger laterally. The locking plunger' might not bev received in a. recess under such circumstances and damage might be done.

1. The combination of a car, a door, means for locking said door, manually operable means or cooperating with said first mentioned means to unlock said door, a con` pler head, a coupler knuckle, and means op erable when said knuckle is in coupling position to prevent operation-of said manually operable means.

2.` The combination of a car,` a door, means for locking said door, manually operable means for cooperating with said first mentioned means to unlock said door, a coupling head, a coupler knuckle, and means operable when said coupler knuckle is in coupling position to prevent operation of said mannally operable means, said last mentioned means permitting operation of said manually operable means when said coupling knuckle is in uncoupling position.y

3. The combination ot a car, a couplerhead, a coupler knuckle, Aa door having re cesses therein, a locking plunger, resilient means urging said plunger into one of said recesses, manually operable means for retracting said locking plunger, and means operative when said knuckle is in coupling` position to prevent operation of said manu ally operable means. Y v

ln testimony that I claim the 'foregoing l have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of l.llisconsin.

FRL, NK L. F SHER. 

